TimeaMandolin is beautiful. I also agree with previous posters who suggested TimotheaMandolin and TheaMandolin. I think the latter is my favorite, but all three are gorgeous. Also, ignore the people who chose to disrespect a name you already asked them to leave alone. I really don't have a problem with Mandolin, and if you really believe that should be her name, go for it

Thank you everyone. I'll present this thread to my husband and see if anything suggested seems appropriate to him. I really like Thea, but think that name alone is a stretch for Tim. I've also thought of coming up with new names, like Timilah (like Tim+Delilah).

Thinking completely outside the box here, if you don't mind place names, what about Timmin? There's a city in Ontario, Canada called Timmins.

Also there's a village in County Kildare, Ireland called Timolin, which has the Irish connection, and sort of combines both names if you wanted to do that. I think it might be pronounced Tie-mo-lin, but I have a few Irish friends I could check with if you like?